/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.iotdb.isession.pool;

import org.apache.iotdb.isession.ISession;
import org.apache.iotdb.isession.SessionDataSet;
import org.apache.iotdb.rpc.IoTDBConnectionException;
import org.apache.iotdb.rpc.StatementExecutionException;
import org.apache.iotdb.tsfile.read.common.RowRecord;

import java.util.List;

public class SessionDataSetWrapper implements AutoCloseable {

    SessionDataSet sessionDataSet;
    ISession session;
    ISessionPool pool;

    public SessionDataSetWrapper(SessionDataSet sessionDataSet, ISession session, ISessionPool pool) {
        this.sessionDataSet = sessionDataSet;
        this.session = session;
        this.pool = pool;
    }

    public ISession getSession() {
        return session;
    }

    public int getBatchSize() {
        return sessionDataSet.getFetchSize();
    }

    public void setBatchSize(int batchSize) {
        sessionDataSet.setFetchSize(batchSize);
    }

    /**
     * If there is an Exception, and you do not want to use the resultset anymore, you have to release
     * the resultset manually by calling closeResultSet
     *
     * @return
     * @throws IoTDBConnectionException
     * @throws StatementExecutionException
     */
    public boolean hasNext() throws IoTDBConnectionException, StatementExecutionException {
        boolean next = sessionDataSet.hasNext();
        if (!next) {
            pool.closeResultSet(this);
        }
        return next;
    }

    /**
     * If there is an Exception, and you do not want to use the resultset anymore, you have to release
     * the resultset manually by calling closeResultSet
     *
     * @return
     * @throws IoTDBConnectionException
     * @throws StatementExecutionException
     */
    public RowRecord next() throws IoTDBConnectionException, StatementExecutionException {
        return sessionDataSet.next();
    }

    /**
     * retrieve data set like jdbc
     */
    public SessionDataSet.DataIterator iterator() {
        return sessionDataSet.iterator();
    }

    public List<String> getColumnNames() {
        return sessionDataSet.getColumnNames();
    }

    public List<String> getColumnTypes() {
        return sessionDataSet.getColumnTypes();
    }

    /**
     * close this dataset to release the session
     */
    @Override
    public void close() {
        pool.closeResultSet(this);
    }

    public void setSession(ISession session) {
        this.session = session;
    }

    public SessionDataSet getSessionDataSet() {
        return sessionDataSet;
    }

    public void setSessionDataSet(SessionDataSet sessionDataSet) {
        this.sessionDataSet = sessionDataSet;
    }
}
